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.\" ========================================================================
.\"
.IX Title "GCJ-DBTOOL 1"
.TH GCJ-DBTOOL 1 "2015-07-16" "gcc-5.2.0" "GNU"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
gcj\-dbtool \- Manipulate class file mapping databases for libgcj
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
gcj-dbtool \fB\s-1OPTION\s0\fR \fI\s-1DBFILE\s0\fR [\fB\s-1MORE\s0\fR] ...
.PP
gcj-dbtool [\fB\-0\fR] [\fB\-\fR] [\fB\-n\fR] [\fB\-a\fR] [\fB\-f\fR]
  [\fB\-t\fR] [\fB\-l\fR] [\fB\-p\fR [\fI\s-1LIBDIR\s0\fR]]
  [\fB\-v\fR] [\fB\-m\fR] [\fB\-\-version\fR] [\fB\-\-help\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`gcj\-dbtool\*(C'\fR is a tool for creating and manipulating class file
mapping databases.  \f(CW\*(C`libgcj\*(C'\fR can use these databases to find a
shared library corresponding to the bytecode representation of a
class.  This functionality is useful for ahead-of-time compilation of
a program that has no knowledge of \f(CW\*(C`gcj\*(C'\fR.
.PP
\&\f(CW\*(C`gcj\-dbtool\*(C'\fR works best if all the jar files added to it are
compiled using \f(CW\*(C`\-findirect\-dispatch\*(C'\fR.
.PP
Note that \f(CW\*(C`gcj\-dbtool\*(C'\fR is currently available as \*(L"preview
technology\*(R".  We believe it is a reasonable way to allow
application-transparent ahead-of-time compilation, but this is an
unexplored area.  We welcome your comments.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-n\fR \fI\s-1DBFILE\s0\fR \fB[\fR\fI\s-1SIZE\s0\fR\fB]\fR" 4
.IX Item "-n DBFILE [SIZE]"
This creates a new database.  Currently, databases cannot be resized;
you can choose a larger initial size if desired.  The default size is
32,749.
.IP "\fB\-a\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1JARFILE\s0\fR\fB \fR\fI\s-1LIB\s0\fR" 4
.IX Item "-a DBFILE JARFILE LIB"
.PD 0
.IP "\fB\-f\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1JARFILE\s0\fR\fB \fR\fI\s-1LIB\s0\fR" 4
.IX Item "-f DBFILE JARFILE LIB"
.PD
This adds a jar file to the database.  For each class file in the jar,
a cryptographic signature of the bytecode representation of the class
is recorded in the database.  At runtime, a class is looked up by its
signature and the compiled form of the class is looked for in the
corresponding shared library.  The \fB\-a\fR option will verify
that \fI\s-1LIB\s0\fR exists before adding it to the database; \fB\-f\fR
skips this check.
.IP "\fB[\fR\fB\-\fR\fB][\fR\fB\-0\fR\fB] \-m\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1DBFILE\s0\fR\fB,[\fR\fI\s-1DBFILE\s0\fR\fB]\fR" 4
.IX Item "[-][-0] -m DBFILE DBFILE,[DBFILE]"
Merge a number of databases.  The output database overwrites any
existing database.  To add databases into an existing database,
include the destination in the list of sources.
.Sp
If \fB\-\fR or \fB\-0\fR are used, the list of files to read is
taken from standard input instead of the command line.  For
\&\fB\-0\fR, Input filenames are terminated by a null character
instead of by whitespace.  Useful when arguments might contain white
space.  The \s-1GNU\s0 find \-print0 option produces input suitable for this
mode.
.IP "\fB\-t\fR \fI\s-1DBFILE\s0\fR" 4
.IX Item "-t DBFILE"
Test a database.
.IP "\fB\-l\fR \fI\s-1DBFILE\s0\fR" 4
.IX Item "-l DBFILE"
List the contents of a database.
.IP "\fB\-p\fR" 4
.IX Item "-p"
Print the name of the default database.  If there is no default
database, this prints a blank line.  If \fI\s-1LIBDIR\s0\fR is specified, use
it instead of the default library directory component of the database
name.
.IP "\fB\-\-help\fR" 4
.IX Item "--help"
Print a help message, then exit.
.IP "\fB\-\-version\fR" 4
.IX Item "--version"
.PD 0
.IP "\fB\-v\fR" 4
.IX Item "-v"
.PD
Print version information, then exit.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIgcc\fR\|(1), \fIgcj\fR\|(1), \fIgcjh\fR\|(1), \fIjcf\-dump\fR\|(1), \fIgfdl\fR\|(7),
and the Info entries for \fIgcj\fR and \fIgcc\fR.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2001\-2015 Free Software Foundation, Inc.
.PP
Permission is granted to copy, distribute and/or modify this document
under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, the Front-Cover Texts being (a) (see below), and
with the Back-Cover Texts being (b) (see below).
A copy of the license is included in the
man page \fIgfdl\fR\|(7).
.PP
(a) The \s-1FSF\s0's Front-Cover Text is:
.PP
.Vb 1
\&     A GNU Manual
.Ve
.PP
(b) The \s-1FSF\s0's Back-Cover Text is:
.PP
.Vb 3
\&     You have freedom to copy and modify this GNU Manual, like GNU
\&     software.  Copies published by the Free Software Foundation raise
\&     funds for GNU development.
.Ve
